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Crystallization Pathways of Multicomponent Oxide Nanocrystals: Critical Role of the Metal Cations Distribution in the Case Study of Metal Ferrites

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    Crystallization Pathways of Multicomponent Oxide Nanocrystals: Critical Role of the Metal Cations Distribution in the Case Study of Metal Ferrites
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    † Consiglio Nazionale delle Ricerche - Istituto per la Microelettronica ed i Microsistemi (C.N.R.-I.M.M.), via Monteroni, I-73100 Lecce, Italy
    ‡ Institució Catalana de Recerca i Estudis Avançats (ICREA) and Institut de Ciència de Materials de Barcelona, CSIC, Campus de la UAB, 08193 Bellaterra, CAT, Spain
    § M2E-IN2UB-XaRMAE, Departament d’Electrònica, Universitat de Barcelona, C. Martí i Franquès 1, 08028 Barcelona, CAT, Spain
    ∥ Institut de Recerca en Energia de Catalunya (IREC), C/Josep Pla 2, B3, E-08019 Barcelona, Spain
    *To whom correspondence should be addressed. E-mail: [email protected]
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    Crystal Growth & Design

    Cite this: Cryst. Growth Des. 2010, 10, 12, 5176–5181
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    https://doi.org/10.1021/cg100959j
    Published October 27, 2010
    Copyright © 2010 American Chemical Society
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    Abstract

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    Metal ferrite (MFe2O4, with M = Fe, Mn, Co, Ni, Cu, Zn) nanoparticles were synthesized by processing metal oxide sols in a coordinating environment. The sols were prepared by forced hydrolysis of the starting metal nitrates, in the presence of acetylacetone for avoiding precipitation. Two different processing routes were investigated. In the first, the sol was injected into a hot (160 °C) solution of dodecylamine in tetradecene. In the second route the injection environment was constituted by pure dodecylamine heated at the same temperature. The precipitate from the first route was heat-treated in air at various temperatures, from 200 to 500 °C. The redispersible nanoparticles from the second route were annealed in oleylamine at temperatures up to 220 °C. In the first case, crystallization was obtained only after heat-treatment at 500 °C, while 220 °C was sufficient for crystallizing the nanoparticles dispersed in oleylamine. The samples from the two routes were investigated by X-ray diffraction and transmission electron microscopy/electron energy loss spectroscopy in the case system of NiFe2O4. The product from the first route, after heating at 200 °C, was a disordered material, with a broad size distribution of aggregates and Ni depletion regions. The product from the second route was constituted by discrete nanoparticles with the correct cation stoichiometry. The interpretation of the results allowed concluding that obtaining simple structural reorganization in nanosized volumes is a key factor for crystallization under mild conditions.

    Copyright © 2010 American Chemical Society

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    Supporting Information

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    XRD data and further TEM images of NiFe2O4 SC nanocrystals (pdf). This material is available free of charge via the Internet at http://pubs.acs.org.

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    Cited By

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    This article is cited by 8 publications.

    1. Adam Szatmari, Rareș Bortnic, Roman Atanasov, Lucian Barbu-Tudoran, Fran Nekvapil, Roxana Dudric, Romulus Tetean. Enhanced Magnetic Properties of Co1−xMnxFe2O4 Nanoparticles. Applied Sciences 2025, 15 (1) , 290. https://doi.org/10.3390/app15010290
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    3. Tanya Prozorov. TEM and Associated Techniques. 2016, 325-346. https://doi.org/10.1002/9783527691395.ch14
    4. Ruyi Zhang, Ming Liu, Lu Lu, Shao-Bo Mi, Chun-Lin Jia, Hong Wang. High-performance CuFe 2 O 4 epitaxial thin films with enhanced ferromagnetic resonance properties. RSC Advances 2016, 6 (102) , 100108-100114. https://doi.org/10.1039/C6RA22016A
    5. S.P. Yadav, S.S. Shinde, Pramod Bhatt, S.S. Meena, K.Y. Rajpure. Distribution of cations in Co1−xMnxFe2O4 using XRD, magnetization and Mössbauer spectroscopy. Journal of Alloys and Compounds 2015, 646 , 550-556. https://doi.org/10.1016/j.jallcom.2015.05.270
    6. Álvaro León-Reyes, Mauro Epifani, Teresa Chávez-Capilla, Jesús Palma, Raül Díaz. Analysis of the Different Mechanisms of Electrochemical Energy Storage in Magnetite Nanoparticles. International Journal of Electrochemical Science 2014, 9 (7) , 3837-3845. https://doi.org/10.1016/S1452-3981(23)08055-0
    7. Eduardo Solano, Leonardo Perez-Mirabet, Fernando Martinez-Julian, Roger Guzmán, Jordi Arbiol, Teresa Puig, Xavier Obradors, Ramón Yañez, Alberto Pomar, Susagna Ricart, Josep Ros. Facile and efficient one-pot solvothermal and microwave-assisted synthesis of stable colloidal solutions of MFe2O4 spinel magnetic nanoparticles. Journal of Nanoparticle Research 2012, 14 (8) https://doi.org/10.1007/s11051-012-1034-y
    8. Mauro Epifani, Teresa Andreu, Sara Abdollahzadeh‐Ghom, Jordi Arbiol, Joan R. Morante. Synthesis of Ceria–Zirconia Nanocrystals with Improved Microstructural Homogeneity and Oxygen Storage Capacity by Hydrolytic Sol–Gel Process in Coordinating Environment. Advanced Functional Materials 2012, 22 (13) , 2867-2875. https://doi.org/10.1002/adfm.201200380
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    Crystal Growth & Design

    Cite this: Cryst. Growth Des. 2010, 10, 12, 5176–5181
    Click to copy citationCitation copied!
    https://doi.org/10.1021/cg100959j
    Published October 27, 2010
    Copyright © 2010 American Chemical Society
    Request reuse permissions

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